import { Cartesian3 } from "../../Source/Cesium.js";
import { Cartesian4 } from "../../Source/Cesium.js";
import { Math as CesiumMath } from "../../Source/Cesium.js";
import { Matrix3 } from "../../Source/Cesium.js";
import { Matrix4 } from "../../Source/Cesium.js";
import { Quaternion } from "../../Source/Cesium.js";
import { TranslationRotationScale } from "../../Source/Cesium.js";

describe("Core/Matrix4", function () {
  it("default constructor creates values array with all zeros.", function () {
    var matrix = new Matrix4();
    expect(matrix[Matrix4.COLUMN0ROW0]).toEqual(0.0);
    expect(matrix[Matrix4.COLUMN1ROW0]).toEqual(0.0);
    expect(matrix[Matrix4.COLUMN2ROW0]).toEqual(0.0);
    expect(matrix[Matrix4.COLUMN3ROW0]).toEqual(0.0);
    expect(matrix[Matrix4.COLUMN0ROW1]).toEqual(0.0);
    expect(matrix[Matrix4.COLUMN1ROW1]).toEqual(0.0);
    expect(matrix[Matrix4.COLUMN2ROW1]).toEqual(0.0);
    expect(matrix[Matrix4.COLUMN3ROW1]).toEqual(0.0);
    expect(matrix[Matrix4.COLUMN0ROW2]).toEqual(0.0);
    expect(matrix[Matrix4.COLUMN1ROW2]).toEqual(0.0);
    expect(matrix[Matrix4.COLUMN2ROW2]).toEqual(0.0);
    expect(matrix[Matrix4.COLUMN3ROW2]).toEqual(0.0);
    expect(matrix[Matrix4.COLUMN0ROW3]).toEqual(0.0);
    expect(matrix[Matrix4.COLUMN1ROW3]).toEqual(0.0);
    expect(matrix[Matrix4.COLUMN2ROW3]).toEqual(0.0);
    expect(matrix[Matrix4.COLUMN3ROW3]).toEqual(0.0);
  });

  it("constructor sets properties from parameters.", function () {
    var matrix = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    expect(matrix[Matrix4.COLUMN0ROW0]).toEqual(1.0);
    expect(matrix[Matrix4.COLUMN1ROW0]).toEqual(2.0);
    expect(matrix[Matrix4.COLUMN2ROW0]).toEqual(3.0);
    expect(matrix[Matrix4.COLUMN3ROW0]).toEqual(4.0);
    expect(matrix[Matrix4.COLUMN0ROW1]).toEqual(5.0);
    expect(matrix[Matrix4.COLUMN1ROW1]).toEqual(6.0);
    expect(matrix[Matrix4.COLUMN2ROW1]).toEqual(7.0);
    expect(matrix[Matrix4.COLUMN3ROW1]).toEqual(8.0);
    expect(matrix[Matrix4.COLUMN0ROW2]).toEqual(9.0);
    expect(matrix[Matrix4.COLUMN1ROW2]).toEqual(10.0);
    expect(matrix[Matrix4.COLUMN2ROW2]).toEqual(11.0);
    expect(matrix[Matrix4.COLUMN3ROW2]).toEqual(12.0);
    expect(matrix[Matrix4.COLUMN0ROW3]).toEqual(13.0);
    expect(matrix[Matrix4.COLUMN1ROW3]).toEqual(14.0);
    expect(matrix[Matrix4.COLUMN2ROW3]).toEqual(15.0);
    expect(matrix[Matrix4.COLUMN3ROW3]).toEqual(16.0);
  });

  it("can pack and unpack", function () {
    var array = [];
    var matrix4 = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    Matrix4.pack(matrix4, array);
    expect(array.length).toEqual(Matrix4.packedLength);
    expect(Matrix4.unpack(array)).toEqual(matrix4);
  });

  it("can pack and unpack with offset", function () {
    var packed = new Array(3);
    var offset = 3;
    var matrix4 = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );

    Matrix4.pack(matrix4, packed, offset);
    expect(packed.length).toEqual(offset + Matrix4.packedLength);

    var result = new Matrix4();
    var returnedResult = Matrix4.unpack(packed, offset, result);
    expect(returnedResult).toBe(result);
    expect(result).toEqual(matrix4);
  });

  it("pack throws with undefined matrix4", function () {
    var array = [];
    expect(function () {
      Matrix4.pack(undefined, array);
    }).toThrowDeveloperError();
  });

  it("pack throws with undefined array", function () {
    var matrix4 = new Matrix4();
    expect(function () {
      Matrix4.pack(matrix4, undefined);
    }).toThrowDeveloperError();
  });

  it("unpack throws with undefined array", function () {
    expect(function () {
      Matrix4.unpack(undefined);
    }).toThrowDeveloperError();
  });

  it("fromArray works without a result parameter", function () {
    var expected = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var matrix = Matrix4.fromArray([
      1.0,
      5.0,
      9.0,
      13.0,
      2.0,
      6.0,
      10.0,
      14.0,
      3.0,
      7.0,
      11.0,
      15.0,
      4.0,
      8.0,
      12.0,
      16.0,
    ]);
    expect(matrix).toEqual(expected);
  });

  it("fromArray works with a result parameter", function () {
    var expected = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var result = new Matrix4();
    var matrix = Matrix4.fromArray(
      [
        1.0,
        5.0,
        9.0,
        13.0,
        2.0,
        6.0,
        10.0,
        14.0,
        3.0,
        7.0,
        11.0,
        15.0,
        4.0,
        8.0,
        12.0,
        16.0,
      ],
      0,
      result
    );
    expect(matrix).toBe(result);
    expect(matrix).toEqual(expected);
  });

  it("fromArray works with a starting index", function () {
    var expected = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var result = new Matrix4();
    var matrix = Matrix4.fromArray(
      [
        0.0,
        0.0,
        0.0,
        1.0,
        5.0,
        9.0,
        13.0,
        2.0,
        6.0,
        10.0,
        14.0,
        3.0,
        7.0,
        11.0,
        15.0,
        4.0,
        8.0,
        12.0,
        16.0,
      ],
      3,
      result
    );
    expect(matrix).toBe(result);
    expect(matrix).toEqual(expected);
  });

  it("fromRowMajorArray works without a result parameter", function () {
    var expected = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var matrix = Matrix4.fromRowMajorArray([
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0,
    ]);
    expect(matrix).toEqual(expected);
  });

  it("fromRowMajorArray works with a result parameter", function () {
    var expected = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var result = new Matrix4();
    var matrix = Matrix4.fromRowMajorArray(
      [
        1.0,
        2.0,
        3.0,
        4.0,
        5.0,
        6.0,
        7.0,
        8.0,
        9.0,
        10.0,
        11.0,
        12.0,
        13.0,
        14.0,
        15.0,
        16.0,
      ],
      result
    );
    expect(matrix).toBe(result);
    expect(matrix).toEqual(expected);
  });

  it("fromColumnMajorArray works without a result parameter", function () {
    var expected = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var matrix = Matrix4.fromColumnMajorArray([
      1.0,
      5.0,
      9.0,
      13.0,
      2.0,
      6.0,
      10.0,
      14.0,
      3.0,
      7.0,
      11.0,
      15.0,
      4.0,
      8.0,
      12.0,
      16.0,
    ]);
    expect(matrix).toEqual(expected);
  });

  it("fromColumnMajorArray works with a result parameter", function () {
    var expected = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var result = new Matrix4();
    var matrix = Matrix4.fromColumnMajorArray(
      [
        1.0,
        5.0,
        9.0,
        13.0,
        2.0,
        6.0,
        10.0,
        14.0,
        3.0,
        7.0,
        11.0,
        15.0,
        4.0,
        8.0,
        12.0,
        16.0,
      ],
      result
    );
    expect(matrix).toBe(result);
    expect(matrix).toEqual(expected);
  });

  it("clone works without a result parameter", function () {
    var expected = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var returnedResult = expected.clone();
    expect(returnedResult).not.toBe(expected);
    expect(returnedResult).toEqual(expected);
  });

  it("clone works with a result parameter", function () {
    var expected = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var result = new Matrix4();
    var returnedResult = expected.clone(result);
    expect(returnedResult).toBe(result);
    expect(returnedResult).not.toBe(expected);
    expect(returnedResult).toEqual(expected);
  });

  it("fromRotationTranslation works without a result parameter", function () {
    var expected = new Matrix4(
      1.0,
      2.0,
      3.0,
      10.0,
      4.0,
      5.0,
      6.0,
      11.0,
      7.0,
      8.0,
      9.0,
      12.0,
      0.0,
      0.0,
      0.0,
      1.0
    );
    var returnedResult = Matrix4.fromRotationTranslation(
      new Matrix3(1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0),
      new Cartesian3(10.0, 11.0, 12.0)
    );
    expect(returnedResult).not.toBe(expected);
    expect(returnedResult).toEqual(expected);
  });

  it("fromRotationTranslation works with a result parameter", function () {
    var expected = new Matrix4(
      1.0,
      2.0,
      3.0,
      10.0,
      4.0,
      5.0,
      6.0,
      11.0,
      7.0,
      8.0,
      9.0,
      12.0,
      0.0,
      0.0,
      0.0,
      1.0
    );
    var result = new Matrix4();
    var returnedResult = Matrix4.fromRotationTranslation(
      new Matrix3(1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0),
      new Cartesian3(10.0, 11.0, 12.0),
      result
    );
    expect(returnedResult).toBe(result);
    expect(returnedResult).not.toBe(expected);
    expect(returnedResult).toEqual(expected);
  });

  it("fromTranslation works without a result parameter", function () {
    var expected = new Matrix4(
      1.0,
      0.0,
      0.0,
      10.0,
      0.0,
      1.0,
      0.0,
      11.0,
      0.0,
      0.0,
      1.0,
      12.0,
      0.0,
      0.0,
      0.0,
      1.0
    );
    var returnedResult = Matrix4.fromTranslation(
      new Cartesian3(10.0, 11.0, 12.0)
    );
    expect(returnedResult).not.toBe(expected);
    expect(returnedResult).toEqual(expected);
  });

  it("fromTranslationQuaternionRotationScale works without a result parameter", function () {
    var expected = new Matrix4(
      7.0,
      0.0,
      0.0,
      1.0,
      0.0,
      0.0,
      9.0,
      2.0,
      0.0,
      -8.0,
      0.0,
      3.0,
      0.0,
      0.0,
      0.0,
      1.0
    );
    var returnedResult = Matrix4.fromTranslationQuaternionRotationScale(
      new Cartesian3(1.0, 2.0, 3.0), // translation
      Quaternion.fromAxisAngle(Cartesian3.UNIT_X, CesiumMath.toRadians(-90.0)), // rotation
      new Cartesian3(7.0, 8.0, 9.0)
    ); // scale
    expect(returnedResult).not.toBe(expected);
    expect(returnedResult).toEqualEpsilon(expected, CesiumMath.EPSILON14);
  });

  it("fromTranslationQuaternionRotationScale works with a result parameter", function () {
    var expected = new Matrix4(
      7.0,
      0.0,
      0.0,
      1.0,
      0.0,
      0.0,
      9.0,
      2.0,
      0.0,
      -8.0,
      0.0,
      3.0,
      0.0,
      0.0,
      0.0,
      1.0
    );
    var result = new Matrix4();
    var returnedResult = Matrix4.fromTranslationQuaternionRotationScale(
      new Cartesian3(1.0, 2.0, 3.0), // translation
      Quaternion.fromAxisAngle(Cartesian3.UNIT_X, CesiumMath.toRadians(-90.0)), // rotation
      new Cartesian3(7.0, 8.0, 9.0), // scale
      result
    );
    expect(returnedResult).toBe(result);
    expect(returnedResult).not.toBe(expected);
    expect(returnedResult).toEqualEpsilon(expected, CesiumMath.EPSILON14);
  });

  it("fromTranslationRotationScale works without a result parameter", function () {
    var expected = new Matrix4(
      7.0,
      0.0,
      0.0,
      1.0,
      0.0,
      0.0,
      9.0,
      2.0,
      0.0,
      -8.0,
      0.0,
      3.0,
      0.0,
      0.0,
      0.0,
      1.0
    );

    var trs = new TranslationRotationScale(
      new Cartesian3(1.0, 2.0, 3.0),
      Quaternion.fromAxisAngle(Cartesian3.UNIT_X, CesiumMath.toRadians(-90.0)),
      new Cartesian3(7.0, 8.0, 9.0)
    );

    var returnedResult = Matrix4.fromTranslationRotationScale(trs);
    expect(returnedResult).not.toBe(expected);
    expect(returnedResult).toEqualEpsilon(expected, CesiumMath.EPSILON14);
  });

  it("fromTranslationRotationScale works with a result parameter", function () {
    var expected = new Matrix4(
      7.0,
      0.0,
      0.0,
      1.0,
      0.0,
      0.0,
      9.0,
      2.0,
      0.0,
      -8.0,
      0.0,
      3.0,
      0.0,
      0.0,
      0.0,
      1.0
    );

    var trs = new TranslationRotationScale(
      new Cartesian3(1.0, 2.0, 3.0),
      Quaternion.fromAxisAngle(Cartesian3.UNIT_X, CesiumMath.toRadians(-90.0)),
      new Cartesian3(7.0, 8.0, 9.0)
    );

    var result = new Matrix4();
    var returnedResult = Matrix4.fromTranslationRotationScale(trs, result);
    expect(returnedResult).toBe(result);
    expect(returnedResult).not.toBe(expected);
    expect(returnedResult).toEqualEpsilon(expected, CesiumMath.EPSILON14);
  });

  it("fromTranslation works with a result parameter", function () {
    var expected = new Matrix4(
      1.0,
      0.0,
      0.0,
      10.0,
      0.0,
      1.0,
      0.0,
      11.0,
      0.0,
      0.0,
      1.0,
      12.0,
      0.0,
      0.0,
      0.0,
      1.0
    );
    var result = new Matrix4();
    var returnedResult = Matrix4.fromTranslation(
      new Cartesian3(10.0, 11.0, 12.0),
      result
    );
    expect(returnedResult).toBe(result);
    expect(returnedResult).not.toBe(expected);
    expect(returnedResult).toEqual(expected);
  });

  it("fromScale works without a result parameter", function () {
    var expected = new Matrix4(
      7.0,
      0.0,
      0.0,
      0.0,
      0.0,
      8.0,
      0.0,
      0.0,
      0.0,
      0.0,
      9.0,
      0.0,
      0.0,
      0.0,
      0.0,
      1.0
    );
    var returnedResult = Matrix4.fromScale(new Cartesian3(7.0, 8.0, 9.0));
    expect(returnedResult).not.toBe(expected);
    expect(returnedResult).toEqual(expected);
  });

  it("fromScale works with a result parameter", function () {
    var expected = new Matrix4(
      7.0,
      0.0,
      0.0,
      0.0,
      0.0,
      8.0,
      0.0,
      0.0,
      0.0,
      0.0,
      9.0,
      0.0,
      0.0,
      0.0,
      0.0,
      1.0
    );
    var result = new Matrix4();
    var returnedResult = Matrix4.fromScale(
      new Cartesian3(7.0, 8.0, 9.0),
      result
    );
    expect(returnedResult).toBe(result);
    expect(returnedResult).not.toBe(expected);
    expect(returnedResult).toEqual(expected);
  });

  it("fromUniformScale works without a result parameter", function () {
    var expected = new Matrix4(
      2.0,
      0.0,
      0.0,
      0.0,
      0.0,
      2.0,
      0.0,
      0.0,
      0.0,
      0.0,
      2.0,
      0.0,
      0.0,
      0.0,
      0.0,
      1.0
    );
    var returnedResult = Matrix4.fromUniformScale(2.0);
    expect(returnedResult).toEqual(expected);
  });

  it("fromUniformScale works with a result parameter", function () {
    var expected = new Matrix4(
      2.0,
      0.0,
      0.0,
      0.0,
      0.0,
      2.0,
      0.0,
      0.0,
      0.0,
      0.0,
      2.0,
      0.0,
      0.0,
      0.0,
      0.0,
      1.0
    );
    var result = new Matrix4();
    var returnedResult = Matrix4.fromUniformScale(2.0, result);
    expect(returnedResult).toBe(result);
    expect(returnedResult).toEqual(expected);
  });

  it("computePerspectiveFieldOfView works", function () {
    var expected = new Matrix4(
      1,
      0,
      0,
      0,
      0,
      1,
      0,
      0,
      0,
      0,
      -1.222222222222222,
      -2.222222222222222,
      0,
      0,
      -1,
      0
    );
    var result = new Matrix4();
    var returnedResult = Matrix4.computePerspectiveFieldOfView(
      CesiumMath.PI_OVER_TWO,
      1,
      1,
      10,
      result
    );
    expect(returnedResult).toEqualEpsilon(expected, CesiumMath.EPSILON15);
  });

  it("fromCamera works without a result parameter", function () {
    var expected = Matrix4.IDENTITY;
    var returnedResult = Matrix4.fromCamera({
      position: Cartesian3.ZERO,
      direction: Cartesian3.negate(Cartesian3.UNIT_Z, new Cartesian3()),
      up: Cartesian3.UNIT_Y,
    });
    expect(expected).toEqual(returnedResult);
  });

  it("fromCamera works with a result parameter", function () {
    var expected = Matrix4.IDENTITY;
    var result = new Matrix4();
    var returnedResult = Matrix4.fromCamera(
      {
        position: Cartesian3.ZERO,
        direction: Cartesian3.negate(Cartesian3.UNIT_Z, new Cartesian3()),
        up: Cartesian3.UNIT_Y,
      },
      result
    );
    expect(returnedResult).toBe(result);
    expect(returnedResult).toEqual(expected);
  });

  it("computeOrthographicOffCenter works", function () {
    var expected = new Matrix4(
      2,
      0,
      0,
      -1,
      0,
      2,
      0,
      -5,
      0,
      0,
      -2,
      -1,
      0,
      0,
      0,
      1
    );
    var result = new Matrix4();
    var returnedResult = Matrix4.computeOrthographicOffCenter(
      0,
      1,
      2,
      3,
      0,
      1,
      result
    );
    expect(returnedResult).toBe(result);
    expect(returnedResult).toEqual(expected);
  });

  it("computeViewportTransformation  works", function () {
    var expected = new Matrix4(
      2.0,
      0.0,
      0.0,
      2.0,
      0.0,
      3.0,
      0.0,
      3.0,
      0.0,
      0.0,
      1.0,
      1.0,
      0.0,
      0.0,
      0.0,
      1.0
    );
    var result = new Matrix4();
    var returnedResult = Matrix4.computeViewportTransformation(
      {
        x: 0,
        y: 0,
        width: 4.0,
        height: 6.0,
      },
      0.0,
      2.0,
      result
    );
    expect(returnedResult).toEqual(expected);
    expect(returnedResult).toBe(result);
  });

  it("computePerspectiveOffCenter works", function () {
    var expected = new Matrix4(
      2,
      0,
      3,
      0,
      0,
      2,
      5,
      0,
      0,
      0,
      -3,
      -4,
      0,
      0,
      -1,
      0
    );
    var result = new Matrix4();
    var returnedResult = Matrix4.computePerspectiveOffCenter(
      1,
      2,
      2,
      3,
      1,
      2,
      result
    );
    expect(returnedResult).toEqual(expected);
    expect(returnedResult).toBe(result);
  });

  it("computeInfinitePerspectiveOffCenter  works", function () {
    var expected = new Matrix4(
      2,
      0,
      3,
      0,
      0,
      2,
      5,
      0,
      0,
      0,
      -1,
      -2,
      0,
      0,
      -1,
      0
    );
    var result = new Matrix4();
    var returnedResult = Matrix4.computeInfinitePerspectiveOffCenter(
      1,
      2,
      2,
      3,
      1,
      result
    );
    expect(returnedResult).toEqual(expected);
  });

  it("toArray works without a result parameter", function () {
    var expected = [
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0,
    ];
    var returnedResult = Matrix4.toArray(
      Matrix4.fromColumnMajorArray(expected)
    );
    expect(returnedResult).not.toBe(expected);
    expect(returnedResult).toEqual(expected);
  });

  it("toArray works with a result parameter", function () {
    var expected = [
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0,
    ];
    var result = [];
    var returnedResult = Matrix4.toArray(
      Matrix4.fromColumnMajorArray(expected),
      result
    );
    expect(returnedResult).toBe(result);
    expect(returnedResult).not.toBe(expected);
    expect(returnedResult).toEqual(expected);
  });

  it("getElementIndex works", function () {
    var i = 0;
    for (var col = 0; col < 4; col++) {
      for (var row = 0; row < 4; row++) {
        var index = Matrix4.getElementIndex(col, row);
        expect(index).toEqual(i);
        i++;
      }
    }
  });

  it("getColumn works for each column", function () {
    var matrix = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var expectedColumn0 = new Cartesian4(1.0, 5.0, 9.0, 13.0);
    var expectedColumn1 = new Cartesian4(2.0, 6.0, 10.0, 14.0);
    var expectedColumn2 = new Cartesian4(3.0, 7.0, 11.0, 15.0);
    var expectedColumn3 = new Cartesian4(4.0, 8.0, 12.0, 16.0);

    var resultColumn0 = new Cartesian4();
    var resultColumn1 = new Cartesian4();
    var resultColumn2 = new Cartesian4();
    var resultColumn3 = new Cartesian4();
    var returnedResultColumn0 = Matrix4.getColumn(matrix, 0, resultColumn0);
    var returnedResultColumn1 = Matrix4.getColumn(matrix, 1, resultColumn1);
    var returnedResultColumn2 = Matrix4.getColumn(matrix, 2, resultColumn2);
    var returnedResultColumn3 = Matrix4.getColumn(matrix, 3, resultColumn3);

    expect(resultColumn0).toBe(returnedResultColumn0);
    expect(resultColumn0).toEqual(expectedColumn0);
    expect(resultColumn1).toBe(returnedResultColumn1);
    expect(resultColumn1).toEqual(expectedColumn1);
    expect(resultColumn2).toBe(returnedResultColumn2);
    expect(resultColumn2).toEqual(expectedColumn2);
    expect(resultColumn3).toBe(returnedResultColumn3);
    expect(resultColumn3).toEqual(expectedColumn3);
  });

  it("setColumn works for each column", function () {
    var matrix = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );

    var result = new Matrix4();

    var expected = new Matrix4(
      17.0,
      2.0,
      3.0,
      4.0,
      18.0,
      6.0,
      7.0,
      8.0,
      19.0,
      10.0,
      11.0,
      12.0,
      20.0,
      14.0,
      15.0,
      16.0
    );
    var returnedResult = Matrix4.setColumn(
      matrix,
      0,
      new Cartesian4(17.0, 18.0, 19.0, 20.0),
      result
    );
    expect(result).toBe(returnedResult);
    expect(result).toEqual(expected);

    expected = new Matrix4(
      1.0,
      17.0,
      3.0,
      4.0,
      5.0,
      18.0,
      7.0,
      8.0,
      9.0,
      19.0,
      11.0,
      12.0,
      13.0,
      20.0,
      15.0,
      16.0
    );
    returnedResult = Matrix4.setColumn(
      matrix,
      1,
      new Cartesian4(17.0, 18.0, 19.0, 20.0),
      result
    );
    expect(result).toBe(returnedResult);
    expect(result).toEqual(expected);

    expected = new Matrix4(
      1.0,
      2.0,
      17.0,
      4.0,
      5.0,
      6.0,
      18.0,
      8.0,
      9.0,
      10.0,
      19.0,
      12.0,
      13.0,
      14.0,
      20.0,
      16.0
    );
    returnedResult = Matrix4.setColumn(
      matrix,
      2,
      new Cartesian4(17.0, 18.0, 19.0, 20.0),
      result
    );
    expect(result).toBe(returnedResult);
    expect(result).toEqual(expected);

    expected = new Matrix4(
      1.0,
      2.0,
      3.0,
      17.0,
      5.0,
      6.0,
      7.0,
      18.0,
      9.0,
      10.0,
      11.0,
      19.0,
      13.0,
      14.0,
      15.0,
      20.0
    );
    returnedResult = Matrix4.setColumn(
      matrix,
      3,
      new Cartesian4(17.0, 18.0, 19.0, 20.0),
      result
    );
    expect(result).toBe(returnedResult);
    expect(result).toEqual(expected);
  });

  it("setTranslation works", function () {
    var matrix = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var translation = new Cartesian3(-1.0, -2.0, -3.0);
    var result = new Matrix4();

    var expected = new Matrix4(
      1.0,
      2.0,
      3.0,
      -1.0,
      5.0,
      6.0,
      7.0,
      -2.0,
      9.0,
      10.0,
      11.0,
      -3.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var returnedResult = Matrix4.setTranslation(matrix, translation, result);
    expect(result).toBe(returnedResult);
    expect(result).toEqual(expected);
  });

  it("setScale works", function () {
    var matrix = Matrix4.clone(Matrix4.IDENTITY);
    var result = new Matrix4();
    var newScale = new Cartesian3(1.0, 2.0, 3.0);

    expect(Matrix4.getScale(matrix, new Cartesian3())).toEqual(
      new Cartesian3(1.0, 1.0, 1.0)
    );

    var returnedResult = Matrix4.setScale(matrix, newScale, result);

    expect(Matrix4.getScale(returnedResult, new Cartesian3())).toEqual(
      newScale
    );
    expect(result).toBe(returnedResult);
  });

  it("getRow works for each row", function () {
    var matrix = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var expectedRow0 = new Cartesian4(1.0, 2.0, 3.0, 4.0);
    var expectedRow1 = new Cartesian4(5.0, 6.0, 7.0, 8.0);
    var expectedRow2 = new Cartesian4(9.0, 10.0, 11.0, 12.0);
    var expectedRow3 = new Cartesian4(13.0, 14.0, 15.0, 16.0);

    var resultRow0 = new Cartesian4();
    var resultRow1 = new Cartesian4();
    var resultRow2 = new Cartesian4();
    var resultRow3 = new Cartesian4();
    var returnedResultRow0 = Matrix4.getRow(matrix, 0, resultRow0);
    var returnedResultRow1 = Matrix4.getRow(matrix, 1, resultRow1);
    var returnedResultRow2 = Matrix4.getRow(matrix, 2, resultRow2);
    var returnedResultRow3 = Matrix4.getRow(matrix, 3, resultRow3);

    expect(resultRow0).toBe(returnedResultRow0);
    expect(resultRow0).toEqual(expectedRow0);
    expect(resultRow1).toBe(returnedResultRow1);
    expect(resultRow1).toEqual(expectedRow1);
    expect(resultRow2).toBe(returnedResultRow2);
    expect(resultRow2).toEqual(expectedRow2);
    expect(resultRow3).toBe(returnedResultRow3);
    expect(resultRow3).toEqual(expectedRow3);
  });

  it("setRow works for each row", function () {
    var matrix = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var result = new Matrix4();

    var expected = new Matrix4(
      91.0,
      92.0,
      93.0,
      94.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var returnedResult = Matrix4.setRow(
      matrix,
      0,
      new Cartesian4(91.0, 92.0, 93.0, 94.0),
      result
    );
    expect(result).toBe(returnedResult);
    expect(result).toEqual(expected);

    expected = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      95.0,
      96.0,
      97.0,
      98.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    returnedResult = Matrix4.setRow(
      matrix,
      1,
      new Cartesian4(95.0, 96.0, 97.0, 98.0),
      result
    );
    expect(result).toBe(returnedResult);
    expect(result).toEqual(expected);

    expected = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      99.0,
      910.0,
      911.0,
      912.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    returnedResult = Matrix4.setRow(
      matrix,
      2,
      new Cartesian4(99.0, 910.0, 911.0, 912.0),
      result
    );
    expect(result).toBe(returnedResult);
    expect(result).toEqual(expected);

    expected = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      913.0,
      914.0,
      915.0,
      916.0
    );
    returnedResult = Matrix4.setRow(
      matrix,
      3,
      new Cartesian4(913.0, 914.0, 915.0, 916.0),
      result
    );
    expect(result).toBe(returnedResult);
    expect(result).toEqual(expected);
  });

  it("getScale works", function () {
    var scale = new Cartesian3(1.0, 2.0, 3.0);
    var result = new Cartesian3();
    var computedScale = Matrix4.getScale(Matrix4.fromScale(scale), result);

    expect(computedScale).toBe(result);
    expect(computedScale).toEqualEpsilon(scale, CesiumMath.EPSILON14);
  });

  it("getScale throws without a matrix", function () {
    expect(function () {
      Matrix4.getScale();
    }).toThrowDeveloperError();
  });

  it("getMaximumScale works", function () {
    var m = Matrix4.fromScale(new Cartesian3(1.0, 2.0, 3.0));
    expect(Matrix4.getMaximumScale(m)).toEqualEpsilon(
      3.0,
      CesiumMath.EPSILON14
    );
  });

  it("getMaximumScale throws without a matrix", function () {
    expect(function () {
      Matrix4.getMaximumScale();
    }).toThrowDeveloperError();
  });

  it("multiply works", function () {
    var left = new Matrix4(
      1,
      2,
      3,
      4,
      5,
      6,
      7,
      8,
      9,
      10,
      11,
      12,
      13,
      14,
      15,
      16
    );
    var right = new Matrix4(
      17,
      18,
      19,
      20,
      21,
      22,
      23,
      24,
      25,
      26,
      27,
      28,
      29,
      30,
      31,
      32
    );
    var expected = new Matrix4(
      250,
      260,
      270,
      280,
      618,
      644,
      670,
      696,
      986,
      1028,
      1070,
      1112,
      1354,
      1412,
      1470,
      1528
    );
    var result = new Matrix4();
    var returnedResult = Matrix4.multiply(left, right, result);
    expect(returnedResult).toBe(result);
    expect(result).toEqual(expected);
  });

  it("multiply works with a result parameter that is an input result parameter", function () {
    var left = new Matrix4(
      1,
      2,
      3,
      4,
      5,
      6,
      7,
      8,
      9,
      10,
      11,
      12,
      13,
      14,
      15,
      16
    );
    var right = new Matrix4(
      17,
      18,
      19,
      20,
      21,
      22,
      23,
      24,
      25,
      26,
      27,
      28,
      29,
      30,
      31,
      32
    );
    var expected = new Matrix4(
      250,
      260,
      270,
      280,
      618,
      644,
      670,
      696,
      986,
      1028,
      1070,
      1112,
      1354,
      1412,
      1470,
      1528
    );
    var returnedResult = Matrix4.multiply(left, right, left);
    expect(returnedResult).toBe(left);
    expect(left).toEqual(expected);
  });

  it("add works", function () {
    var left = new Matrix4(
      1,
      2,
      3,
      4,
      5,
      6,
      7,
      8,
      9,
      10,
      11,
      12,
      13,
      14,
      15,
      16
    );
    var right = new Matrix4(
      17,
      18,
      19,
      20,
      21,
      22,
      23,
      24,
      25,
      26,
      27,
      28,
      29,
      30,
      31,
      32
    );
    var expected = new Matrix4(
      18,
      20,
      22,
      24,
      26,
      28,
      30,
      32,
      34,
      36,
      38,
      40,
      42,
      44,
      46,
      48
    );
    var result = new Matrix4();
    var returnedResult = Matrix4.add(left, right, result);
    expect(returnedResult).toBe(result);
    expect(result).toEqual(expected);
  });

  it("add works with a result parameter that is an input result parameter", function () {
    var left = new Matrix4(
      1,
      2,
      3,
      4,
      5,
      6,
      7,
      8,
      9,
      10,
      11,
      12,
      13,
      14,
      15,
      16
    );
    var right = new Matrix4(
      17,
      18,
      19,
      20,
      21,
      22,
      23,
      24,
      25,
      26,
      27,
      28,
      29,
      30,
      31,
      32
    );
    var expected = new Matrix4(
      18,
      20,
      22,
      24,
      26,
      28,
      30,
      32,
      34,
      36,
      38,
      40,
      42,
      44,
      46,
      48
    );
    var returnedResult = Matrix4.add(left, right, left);
    expect(returnedResult).toBe(left);
    expect(left).toEqual(expected);
  });

  it("subtract works", function () {
    var left = new Matrix4(
      18,
      20,
      22,
      24,
      26,
      28,
      30,
      32,
      34,
      36,
      38,
      40,
      42,
      44,
      46,
      48
    );
    var right = new Matrix4(
      17,
      18,
      19,
      20,
      21,
      22,
      23,
      24,
      25,
      26,
      27,
      28,
      29,
      30,
      31,
      32
    );
    var expected = new Matrix4(
      1,
      2,
      3,
      4,
      5,
      6,
      7,
      8,
      9,
      10,
      11,
      12,
      13,
      14,
      15,
      16
    );
    var result = new Matrix4();
    var returnedResult = Matrix4.subtract(left, right, result);
    expect(returnedResult).toBe(result);
    expect(result).toEqual(expected);
  });

  it("subtract works with a result parameter that is an input result parameter", function () {
    var left = new Matrix4(
      18,
      20,
      22,
      24,
      26,
      28,
      30,
      32,
      34,
      36,
      38,
      40,
      42,
      44,
      46,
      48
    );
    var right = new Matrix4(
      17,
      18,
      19,
      20,
      21,
      22,
      23,
      24,
      25,
      26,
      27,
      28,
      29,
      30,
      31,
      32
    );
    var expected = new Matrix4(
      1,
      2,
      3,
      4,
      5,
      6,
      7,
      8,
      9,
      10,
      11,
      12,
      13,
      14,
      15,
      16
    );
    var returnedResult = Matrix4.subtract(left, right, left);
    expect(returnedResult).toBe(left);
    expect(left).toEqual(expected);
  });

  it("multiplyTransformation works", function () {
    var left = new Matrix4(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 0, 0, 0, 1);
    var right = new Matrix4(
      17,
      18,
      19,
      20,
      21,
      22,
      23,
      24,
      25,
      26,
      27,
      28,
      0,
      0,
      0,
      1
    );
    var expected = new Matrix4(
      134,
      140,
      146,
      156,
      386,
      404,
      422,
      448,
      638,
      668,
      698,
      740,
      0,
      0,
      0,
      1
    );
    var result = new Matrix4();
    var returnedResult = Matrix4.multiplyTransformation(left, right, result);
    expect(returnedResult).toBe(result);
    expect(result).toEqual(expected);
  });

  it("multiplyTransformation works with a result parameter that is an input result parameter", function () {
    var left = new Matrix4(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 0, 0, 0, 1);
    var right = new Matrix4(
      17,
      18,
      19,
      20,
      21,
      22,
      23,
      24,
      25,
      26,
      27,
      28,
      0,
      0,
      0,
      1
    );
    var expected = new Matrix4(
      134,
      140,
      146,
      156,
      386,
      404,
      422,
      448,
      638,
      668,
      698,
      740,
      0,
      0,
      0,
      1
    );
    var returnedResult = Matrix4.multiplyTransformation(left, right, left);
    expect(returnedResult).toBe(left);
    expect(left).toEqual(expected);
  });

  it("multiplyByMatrix3 works", function () {
    var left = Matrix4.fromRotationTranslation(
      Matrix3.fromRotationZ(CesiumMath.toRadians(45.0)),
      new Cartesian3(1.0, 2.0, 3.0)
    );
    var rightRotation = Matrix3.fromRotationX(CesiumMath.toRadians(30.0));
    var right = Matrix4.fromRotationTranslation(rightRotation);
    var expected = new Matrix4.multiplyTransformation(
      left,
      right,
      new Matrix4()
    );
    var result = new Matrix4();
    var returnedResult = Matrix4.multiplyByMatrix3(left, rightRotation, result);
    expect(returnedResult).toBe(result);
    expect(result).toEqual(expected);
  });

  it("multiplyByMatrix3 works with a result parameter that is an input result parameter", function () {
    var left = Matrix4.fromRotationTranslation(
      Matrix3.fromRotationZ(CesiumMath.toRadians(45.0)),
      new Cartesian3(1.0, 2.0, 3.0)
    );
    var rightRotation = Matrix3.fromRotationX(CesiumMath.toRadians(30.0));
    var right = Matrix4.fromRotationTranslation(rightRotation);
    var expected = new Matrix4.multiplyTransformation(
      left,
      right,
      new Matrix4()
    );
    var returnedResult = Matrix4.multiplyByMatrix3(left, rightRotation, left);
    expect(returnedResult).toBe(left);
    expect(left).toEqual(expected);
  });

  it("multiplyByTranslation works", function () {
    var m = new Matrix4(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 0, 0, 0, 1);
    var translation = new Cartesian3(17, 18, 19);
    var expected = Matrix4.multiply(
      m,
      Matrix4.fromTranslation(translation),
      new Matrix4()
    );
    var result = new Matrix4();
    var returnedResult = Matrix4.multiplyByTranslation(m, translation, result);
    expect(returnedResult).toBe(result);
    expect(result).toEqual(expected);
  });

  it("multiplyByTranslation works with a result parameter that is an input result parameter", function () {
    var m = new Matrix4(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 0, 0, 0, 1);
    var translation = new Cartesian3(17, 18, 19);
    var expected = Matrix4.multiply(
      m,
      Matrix4.fromTranslation(translation),
      new Matrix4()
    );
    var returnedResult = Matrix4.multiplyByTranslation(m, translation, m);
    expect(returnedResult).toBe(m);
    expect(m).toEqual(expected);
  });

  it("multiplyByUniformScale works", function () {
    var m = new Matrix4(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 0, 0, 0, 1);
    var scale = 1.0;
    var expected = Matrix4.multiply(
      m,
      Matrix4.fromUniformScale(scale),
      new Matrix4()
    );
    var result = new Matrix4();
    var returnedResult = Matrix4.multiplyByUniformScale(m, scale, result);
    expect(returnedResult).toBe(result);
    expect(result).toEqual(expected);
  });

  it("multiplyByUniformScale works with a result parameter that is an input result parameter", function () {
    var m = new Matrix4(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 0, 0, 0, 1);
    var scale = 2.0;
    var expected = Matrix4.multiply(
      m,
      Matrix4.fromUniformScale(scale),
      new Matrix4()
    );
    var returnedResult = Matrix4.multiplyByUniformScale(m, scale, m);
    expect(returnedResult).toBe(m);
    expect(m).toEqual(expected);
  });

  it("multiplyByScale works", function () {
    var m = new Matrix4(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 0, 0, 0, 1);
    var scale = new Cartesian3(1.0, 1.0, 1.0);
    var expected = Matrix4.multiply(m, Matrix4.fromScale(scale), new Matrix4());
    var result = new Matrix4();
    var returnedResult = Matrix4.multiplyByScale(m, scale, result);
    expect(returnedResult).toBe(result);
    expect(result).toEqual(expected);

    m = new Matrix4(2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 0, 0, 0, 1);
    scale = new Cartesian3(2.0, 3.0, 4.0);
    expected = Matrix4.multiply(m, Matrix4.fromScale(scale), new Matrix4());
    result = new Matrix4();
    returnedResult = Matrix4.multiplyByScale(m, scale, result);
    expect(returnedResult).toBe(result);
    expect(result).toEqual(expected);
  });

  it('multiplyByScale works with "this" result parameter', function () {
    var m = new Matrix4(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 0, 0, 0, 1);
    var scale = new Cartesian3(1.0, 2.0, 3.0);
    var expected = Matrix4.multiply(m, Matrix4.fromScale(scale), new Matrix4());
    var returnedResult = Matrix4.multiplyByScale(m, scale, m);
    expect(returnedResult).toBe(m);
    expect(m).toEqual(expected);
  });

  it("multiplyByVector works", function () {
    var left = new Matrix4(
      1,
      2,
      3,
      4,
      5,
      6,
      7,
      8,
      9,
      10,
      11,
      12,
      13,
      14,
      15,
      16
    );
    var right = new Cartesian4(17, 18, 19, 20);
    var expected = new Cartesian4(190, 486, 782, 1078);
    var result = new Cartesian4();
    var returnedResult = Matrix4.multiplyByVector(left, right, result);
    expect(returnedResult).toBe(result);
    expect(result).toEqual(expected);
  });

  it("multiplyByPoint works", function () {
    var left = new Matrix4(
      1,
      2,
      3,
      4,
      5,
      6,
      7,
      8,
      9,
      10,
      11,
      12,
      13,
      14,
      15,
      16
    );
    var right = new Cartesian3(17, 18, 19);
    var expected = new Cartesian3(114, 334, 554);
    var result = new Cartesian3();
    var returnedResult = Matrix4.multiplyByPoint(left, right, result);
    expect(returnedResult).toBe(result);
    expect(result).toEqual(expected);
  });

  it("multiplyByPointAsVector works", function () {
    var left = new Matrix4(
      1,
      2,
      3,
      4,
      5,
      6,
      7,
      8,
      9,
      10,
      11,
      12,
      13,
      14,
      15,
      16
    );
    var right = new Cartesian3(17, 18, 19);
    var expected = new Cartesian3(110, 326, 542);
    var result = new Cartesian3();
    var returnedResult = Matrix4.multiplyByPointAsVector(left, right, result);
    expect(returnedResult).toBe(result);
    expect(result).toEqual(expected);
  });

  it("multiplyByScalar works", function () {
    var left = new Matrix4(
      1,
      2,
      3,
      4,
      5,
      6,
      7,
      8,
      9,
      10,
      11,
      12,
      13,
      14,
      15,
      16
    );
    var right = 2;
    var expected = new Matrix4(
      2,
      4,
      6,
      8,
      10,
      12,
      14,
      16,
      18,
      20,
      22,
      24,
      26,
      28,
      30,
      32
    );
    var result = new Matrix4();
    var returnedResult = Matrix4.multiplyByScalar(left, right, result);
    expect(returnedResult).toBe(result);
    expect(result).toEqual(expected);
  });

  it("negate works", function () {
    var matrix = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var expected = new Matrix4(
      -1.0,
      -2.0,
      -3.0,
      -4.0,
      -5.0,
      -6.0,
      -7.0,
      -8.0,
      -9.0,
      -10.0,
      -11.0,
      -12.0,
      -13.0,
      -14.0,
      -15.0,
      -16.0
    );
    var result = new Matrix4();
    var returnedResult = Matrix4.negate(matrix, result);
    expect(result).toBe(returnedResult);
    expect(result).toEqual(expected);
  });

  it("negate works with a result parameter that is an input result parameter", function () {
    var matrix = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var expected = new Matrix4(
      -1.0,
      -2.0,
      -3.0,
      -4.0,
      -5.0,
      -6.0,
      -7.0,
      -8.0,
      -9.0,
      -10.0,
      -11.0,
      -12.0,
      -13.0,
      -14.0,
      -15.0,
      -16.0
    );
    var returnedResult = Matrix4.negate(matrix, matrix);
    expect(matrix).toBe(returnedResult);
    expect(matrix).toEqual(expected);
  });

  it("transpose works", function () {
    var matrix = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var expected = new Matrix4(
      1.0,
      5.0,
      9.0,
      13.0,
      2.0,
      6.0,
      10.0,
      14.0,
      3.0,
      7.0,
      11.0,
      15.0,
      4.0,
      8.0,
      12.0,
      16.0
    );
    var result = new Matrix4();
    var returnedResult = Matrix4.transpose(matrix, result);
    expect(result).toBe(returnedResult);
    expect(result).toEqual(expected);
  });

  it("transpose works with a result parameter that is an input result parameter", function () {
    var matrix = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var expected = new Matrix4(
      1.0,
      5.0,
      9.0,
      13.0,
      2.0,
      6.0,
      10.0,
      14.0,
      3.0,
      7.0,
      11.0,
      15.0,
      4.0,
      8.0,
      12.0,
      16.0
    );
    var returnedResult = Matrix4.transpose(matrix, matrix);
    expect(matrix).toBe(returnedResult);
    expect(matrix).toEqual(expected);
  });

  it("equals works in all cases", function () {
    var left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var right = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    expect(Matrix4.equals(left, right)).toEqual(true);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(5.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0);
    expect(Matrix4.equals(left, right)).toEqual(false);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(1.0, 6.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0);
    expect(Matrix4.equals(left, right)).toEqual(false);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(1.0, 2.0, 7.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0);
    expect(Matrix4.equals(left, right)).toEqual(false);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(1.0, 2.0, 3.0, 8.0, 5.0, 6.0, 7.0, 8.0, 9.0);
    expect(Matrix4.equals(left, right)).toEqual(false);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(1.0, 2.0, 3.0, 4.0, 9.0, 6.0, 7.0, 8.0, 9.0);
    expect(Matrix4.equals(left, right)).toEqual(false);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(1.0, 2.0, 3.0, 4.0, 5.0, 10.0, 7.0, 8.0, 9.0);
    expect(Matrix4.equals(left, right)).toEqual(false);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 11.0, 8.0, 9.0);
    expect(Matrix4.equals(left, right)).toEqual(false);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 12.0, 9.0);
    expect(Matrix4.equals(left, right)).toEqual(false);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 13.0);
    expect(Matrix4.equals(left, right)).toEqual(false);
  });

  it("equals works with undefined", function () {
    expect(Matrix4.equals(undefined, undefined)).toEqual(true);
    expect(Matrix4.equals(new Matrix4(), undefined)).toEqual(false);
    expect(Matrix4.equals(undefined, new Matrix4())).toEqual(false);
  });

  it("equalsEpsilon works in all cases", function () {
    var left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var right = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    expect(Matrix4.equalsEpsilon(left, right, 1.0)).toEqual(true);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(
      5.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    expect(Matrix4.equalsEpsilon(left, right, 3.9)).toEqual(false);
    expect(Matrix4.equalsEpsilon(left, right, 4.0)).toEqual(true);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(
      1.0,
      6.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    expect(Matrix4.equalsEpsilon(left, right, 3.9)).toEqual(false);
    expect(Matrix4.equalsEpsilon(left, right, 4.0)).toEqual(true);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(
      1.0,
      2.0,
      7.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    expect(Matrix4.equalsEpsilon(left, right, 3.9)).toEqual(false);
    expect(Matrix4.equalsEpsilon(left, right, 4.0)).toEqual(true);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(
      1.0,
      2.0,
      3.0,
      8.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    expect(Matrix4.equalsEpsilon(left, right, 3.9)).toEqual(false);
    expect(Matrix4.equalsEpsilon(left, right, 4.0)).toEqual(true);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      9.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    expect(Matrix4.equalsEpsilon(left, right, 3.9)).toEqual(false);
    expect(Matrix4.equalsEpsilon(left, right, 4.0)).toEqual(true);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      10.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    expect(Matrix4.equalsEpsilon(left, right, 3.9)).toEqual(false);
    expect(Matrix4.equalsEpsilon(left, right, 4.0)).toEqual(true);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      11.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    expect(Matrix4.equalsEpsilon(left, right, 3.9)).toEqual(false);
    expect(Matrix4.equalsEpsilon(left, right, 4.0)).toEqual(true);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      12.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    expect(Matrix4.equalsEpsilon(left, right, 3.9)).toEqual(false);
    expect(Matrix4.equalsEpsilon(left, right, 4.0)).toEqual(true);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      13.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    expect(Matrix4.equalsEpsilon(left, right, 3.9)).toEqual(false);
    expect(Matrix4.equalsEpsilon(left, right, 4.0)).toEqual(true);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      14.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    expect(Matrix4.equalsEpsilon(left, right, 3.9)).toEqual(false);
    expect(Matrix4.equalsEpsilon(left, right, 4.0)).toEqual(true);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      15.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    expect(Matrix4.equalsEpsilon(left, right, 3.9)).toEqual(false);
    expect(Matrix4.equalsEpsilon(left, right, 4.0)).toEqual(true);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      16.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    expect(Matrix4.equalsEpsilon(left, right, 3.9)).toEqual(false);
    expect(Matrix4.equalsEpsilon(left, right, 4.0)).toEqual(true);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      17.0,
      14.0,
      15.0,
      16.0
    );
    expect(Matrix4.equalsEpsilon(left, right, 3.9)).toEqual(false);
    expect(Matrix4.equalsEpsilon(left, right, 4.0)).toEqual(true);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      18.0,
      15.0,
      16.0
    );
    expect(Matrix4.equalsEpsilon(left, right, 3.9)).toEqual(false);
    expect(Matrix4.equalsEpsilon(left, right, 4.0)).toEqual(true);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      19.0,
      16.0
    );
    expect(Matrix4.equalsEpsilon(left, right, 3.9)).toEqual(false);
    expect(Matrix4.equalsEpsilon(left, right, 4.0)).toEqual(true);

    left = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    right = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      20.0
    );
    expect(Matrix4.equalsEpsilon(left, right, 3.9)).toEqual(false);
    expect(Matrix4.equalsEpsilon(left, right, 4.0)).toEqual(true);
  });

  it("equalsEpsilon works with undefined", function () {
    expect(Matrix4.equalsEpsilon(undefined, undefined, 1.0)).toEqual(true);
    expect(Matrix4.equalsEpsilon(new Matrix4(), undefined, 1.0)).toEqual(false);
    expect(Matrix4.equalsEpsilon(undefined, new Matrix4(), 1.0)).toEqual(false);
  });

  it("toString", function () {
    var matrix = new Matrix4(
      1,
      2,
      3,
      4,
      5,
      6,
      7,
      8,
      9,
      10,
      11,
      12,
      13,
      14,
      15,
      16
    );
    expect(matrix.toString()).toEqual(
      "(1, 2, 3, 4)\n(5, 6, 7, 8)\n(9, 10, 11, 12)\n(13, 14, 15, 16)"
    );
  });

  it("getTranslation works", function () {
    var matrix = new Matrix4(
      1,
      2,
      3,
      4,
      5,
      6,
      7,
      8,
      9,
      10,
      11,
      12,
      13,
      14,
      15,
      16
    );
    var expected = new Cartesian3(4, 8, 12);
    var result = new Cartesian3();
    var returnedResult = Matrix4.getTranslation(matrix, result);
    expect(returnedResult).toBe(result);
    expect(expected).toEqual(returnedResult);
  });

  it("getMatrix3 works", function () {
    var matrix = new Matrix4(
      1,
      2,
      3,
      4,
      5,
      6,
      7,
      8,
      9,
      10,
      11,
      12,
      13,
      14,
      15,
      16
    );
    var expected = new Matrix3(1, 2, 3, 5, 6, 7, 9, 10, 11);
    var result = new Matrix3();
    var returnedResult = Matrix4.getMatrix3(matrix, result);
    expect(returnedResult).toBe(result);
    expect(expected).toEqual(returnedResult);
  });

  it("inverse works", function () {
    var matrix = new Matrix4(
      0.72,
      0.7,
      0.0,
      0.0,
      -0.4,
      0.41,
      0.82,
      0.0,
      0.57,
      -0.59,
      0.57,
      -3.86,
      0.0,
      0.0,
      0.0,
      1.0
    );

    var expected = new Matrix4(
      0.7150830193944467,
      -0.3976559229803265,
      0.5720664155155574,
      2.2081763638900513,
      0.6930574657657118,
      0.40901752077976433,
      -0.5884111702445733,
      -2.271267117144053,
      0.0022922521876059163,
      0.8210249357172755,
      0.5732623731786561,
      2.2127927604696125,
      0.0,
      0.0,
      0.0,
      1.0
    );

    var result = new Matrix4();
    var returnedResult = Matrix4.inverse(matrix, result);
    expect(returnedResult).toBe(result);
    expect(expected).toEqualEpsilon(returnedResult, CesiumMath.EPSILON20);
    expect(
      Matrix4.multiply(returnedResult, matrix, new Matrix4())
    ).toEqualEpsilon(Matrix4.IDENTITY, CesiumMath.EPSILON15);
  });

  it("inverse translates zero scale matrix", function () {
    var matrix = Matrix4.fromTranslation(new Cartesian3(1.0, 2.0, 3.0));
    matrix = Matrix4.multiplyByUniformScale(matrix, 0.0, matrix);
    var expected = Matrix4.fromTranslation(new Cartesian3(-1.0, -2.0, -3.0));
    expected = Matrix4.multiplyByUniformScale(expected, 0.0, expected);

    var result = Matrix4.inverse(matrix, new Matrix4());
    expect(expected).toEqualEpsilon(result, CesiumMath.EPSILON20);
  });

  it("inverse behaves acceptably with near single precision zero scale matrix", function () {
    var trs = new TranslationRotationScale(
      new Cartesian3(0.0, 0.0, 0.0),
      Quaternion.fromAxisAngle(Cartesian3.UNIT_X, 0.0),
      new Cartesian3(1.0e-7, 1.0e-7, 1.1e-7)
    );

    var matrix = Matrix4.fromTranslationRotationScale(trs);

    var expected = new Matrix4(
      1e7,
      0,
      0,
      0,
      0,
      1e7,
      0,
      0,
      0,
      0,
      (1.0 / 1.1) * 1e7,
      0,
      0,
      0,
      0,
      1
    );

    var result = Matrix4.inverse(matrix, new Matrix4());
    expect(expected).toEqualEpsilon(result, CesiumMath.EPSILON15);
  });

  it("inverse behaves acceptably with single precision zero scale matrix", function () {
    var trs = new TranslationRotationScale(
      new Cartesian3(0.0, 0.0, 0.0),
      Quaternion.fromAxisAngle(Cartesian3.UNIT_X, 0.0),
      new Cartesian3(1.8e-8, 1.2e-8, 1.2e-8)
    );

    var matrix = Matrix4.fromTranslationRotationScale(trs);

    var expected = new Matrix4(
      0,
      0,
      0,
      -matrix[12],
      0,
      0,
      0,
      -matrix[13],
      0,
      0,
      0,
      -matrix[14],
      0,
      0,
      0,
      1
    );

    var result = Matrix4.inverse(matrix, new Matrix4());
    expect(expected).toEqualEpsilon(result, CesiumMath.EPSILON20);
  });

  it("inverseTransformation works", function () {
    var matrix = new Matrix4(1, 0, 0, 10, 0, 0, 1, 20, 0, 1, 0, 30, 0, 0, 0, 1);

    var expected = new Matrix4(
      1,
      0,
      0,
      -10,
      0,
      0,
      1,
      -30,
      0,
      1,
      0,
      -20,
      0,
      0,
      0,
      1
    );

    var result = new Matrix4();
    var returnedResult = Matrix4.inverseTransformation(matrix, result);
    expect(returnedResult).toBe(result);
    expect(expected).toEqual(returnedResult);
    expect(Matrix4.multiply(returnedResult, matrix, new Matrix4())).toEqual(
      Matrix4.IDENTITY
    );
  });

  it("abs throws without a matrix", function () {
    expect(function () {
      return Matrix4.abs();
    }).toThrowDeveloperError();
  });

  it("abs works", function () {
    var matrix = new Matrix4(
      -1.0,
      -2.0,
      -3.0,
      -4.0,
      -5.0,
      -6.0,
      -7.0,
      -8.0,
      -9.0,
      -10.0,
      -11.0,
      -12.0,
      -13.0,
      -14.0,
      -15.0,
      -16.0
    );
    var expected = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var result = new Matrix4();
    var returnedResult = Matrix4.abs(matrix, result);
    expect(returnedResult).toEqual(expected);

    matrix = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    returnedResult = Matrix4.abs(matrix, result);
    expect(returnedResult).toEqual(expected);

    matrix = new Matrix4(
      1.0,
      -2.0,
      -3.0,
      4.0,
      5.0,
      -6.0,
      7.0,
      -8.0,
      9.0,
      -10.0,
      11.0,
      -12.0,
      13.0,
      -14.0,
      15.0,
      -16.0
    );
    returnedResult = Matrix4.abs(matrix, result);
    expect(returnedResult).toEqual(expected);
  });

  it("abs works with a result parameter that is an input result parameter", function () {
    var matrix = new Matrix4(
      -1.0,
      -2.0,
      -3.0,
      -4.0,
      -5.0,
      -6.0,
      -7.0,
      -8.0,
      -9.0,
      -10.0,
      -11.0,
      -12.0,
      -13.0,
      -14.0,
      -15.0,
      -16.0
    );
    var expected = new Matrix4(
      1.0,
      2.0,
      3.0,
      4.0,
      5.0,
      6.0,
      7.0,
      8.0,
      9.0,
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0
    );
    var returnedResult = Matrix4.abs(matrix, matrix);
    expect(matrix).toBe(returnedResult);
    expect(matrix).toEqual(expected);
  });

  it("fromArray throws without an array", function () {
    expect(function () {
      return Matrix4.fromArray();
    }).toThrowDeveloperError();
  });

  it("fromRowMajorArray throws with undefined parameter", function () {
    expect(function () {
      Matrix4.fromRowMajorArray(undefined);
    }).toThrowDeveloperError();
  });

  it("fromColumnMajorArray throws with undefined parameter", function () {
    expect(function () {
      Matrix4.fromColumnMajorArray(undefined);
    }).toThrowDeveloperError();
  });

  it("fromRotationTranslation throws without rotation parameter", function () {
    expect(function () {
      Matrix4.fromRotationTranslation(undefined, new Cartesian3());
    }).toThrowDeveloperError();
  });

  it("fromTranslationQuaternionRotationScale throws without translation parameter", function () {
    expect(function () {
      Matrix4.fromTranslationQuaternionRotationScale(
        undefined,
        new Quaternion(),
        new Cartesian3()
      );
    }).toThrowDeveloperError();
  });

  it("fromTranslationQuaternionRotationScale throws without rotation parameter", function () {
    expect(function () {
      Matrix4.fromTranslationQuaternionRotationScale(
        new Matrix3(),
        undefined,
        new Cartesian3()
      );
    }).toThrowDeveloperError();
  });

  it("fromTranslationQuaternionRotationScale throws without scale parameter", function () {
    expect(function () {
      Matrix4.fromTranslationQuaternionRotationScale(
        new Matrix3(),
        new Quaternion(),
        undefined
      );
    }).toThrowDeveloperError();
  });

  it("fromTranslation throws without translation parameter", function () {
    expect(function () {
      Matrix4.fromTranslation(undefined);
    }).toThrowDeveloperError();
  });

  it("fromScale throws without scale parameter", function () {
    expect(function () {
      Matrix4.fromScale(undefined);
    }).toThrowDeveloperError();
  });

  it("fromUniformScale throws without scale parameter", function () {
    expect(function () {
      Matrix4.fromUniformScale(undefined);
    }).toThrowDeveloperError();
  });

  it("fromCamera throws without camera", function () {
    expect(function () {
      Matrix4.fromCamera(undefined);
    }).toThrowDeveloperError();
  });

  it("fromCamera throws without position", function () {
    expect(function () {
      Matrix4.fromCamera({
        direction: Cartesian3.negate(Cartesian3.UNIT_Z, new Cartesian3()),
        up: Cartesian3.UNIT_Y,
      });
    }).toThrowDeveloperError();
  });

  it("fromCamera throws without direction", function () {
    expect(function () {
      Matrix4.fromCamera({
        position: Cartesian3.ZERO,
        up: Cartesian3.UNIT_Y,
      });
    }).toThrowDeveloperError();
  });

  it("fromCamera throws without up", function () {
    expect(function () {
      Matrix4.fromCamera({
        position: Cartesian3.ZERO,
        direction: Cartesian3.negate(Cartesian3.UNIT_Z, new Cartesian3()),
      });
    }).toThrowDeveloperError();
  });

  it("computeOrthographicOffCenter throws without left", function () {
    expect(function () {
      var right = 0,
        bottom = 0,
        top = 0,
        near = 0,
        far = 0;
      Matrix4.computeOrthographicOffCenter(
        undefined,
        right,
        bottom,
        top,
        near,
        far
      );
    }).toThrowDeveloperError();
  });

  it("computeOrthographicOffCenter throws without right", function () {
    expect(function () {
      var left = 0,
        bottom = 0,
        top = 0,
        near = 0,
        far = 0;
      Matrix4.computeOrthographicOffCenter(
        left,
        undefined,
        bottom,
        top,
        near,
        far
      );
    }).toThrowDeveloperError();
  });

  it("computeOrthographicOffCenter throws without bottom", function () {
    expect(function () {
      var left = 0,
        right = 0,
        top = 0,
        near = 0,
        far = 0;
      Matrix4.computeOrthographicOffCenter(
        left,
        right,
        undefined,
        top,
        near,
        far
      );
    }).toThrowDeveloperError();
  });

  it("computeOrthographicOffCenter throws without top", function () {
    expect(function () {
      var left = 0,
        right = 0,
        bottom = 0,
        near = 0,
        far = 0;
      Matrix4.computeOrthographicOffCenter(
        left,
        right,
        bottom,
        undefined,
        near,
        far
      );
    }).toThrowDeveloperError();
  });

  it("computeOrthographicOffCenter throws without near", function () {
    expect(function () {
      var left = 0,
        right = 0,
        bottom = 0,
        top = 0,
        far = 0;
      Matrix4.computeOrthographicOffCenter(
        left,
        right,
        bottom,
        top,
        undefined,
        far
      );
    }).toThrowDeveloperError();
  });

  it("computeOrthographicOffCenter throws without far", function () {
    expect(function () {
      var left = 0,
        right = 0,
        bottom = 0,
        top = 0,
        near = 0;
      Matrix4.computeOrthographicOffCenter(
        left,
        right,
        bottom,
        top,
        near,
        undefined
      );
    }).toThrowDeveloperError();
  });

  it("computePerspectiveOffCenter throws without left", function () {
    expect(function () {
      var right = 0,
        bottom = 0,
        top = 0,
        near = 0,
        far = 0;
      Matrix4.computePerspectiveOffCenter(
        undefined,
        right,
        bottom,
        top,
        near,
        far
      );
    }).toThrowDeveloperError();
  });

  it("computePerspectiveOffCenter throws without right", function () {
    expect(function () {
      var left = 0,
        bottom = 0,
        top = 0,
        near = 0,
        far = 0;
      Matrix4.computePerspectiveOffCenter(
        left,
        undefined,
        bottom,
        top,
        near,
        far
      );
    }).toThrowDeveloperError();
  });

  it("computePerspectiveOffCenter throws without bottom", function () {
    expect(function () {
      var left = 0,
        right = 0,
        top = 0,
        near = 0,
        far = 0;
      Matrix4.computePerspectiveOffCenter(
        left,
        right,
        undefined,
        top,
        near,
        far
      );
    }).toThrowDeveloperError();
  });

  it("computePerspectiveOffCenter throws without top", function () {
    expect(function () {
      var left = 0,
        right = 0,
        bottom = 0,
        near = 0,
        far = 0;
      Matrix4.computePerspectiveOffCenter(
        left,
        right,
        bottom,
        undefined,
        near,
        far
      );
    }).toThrowDeveloperError();
  });

  it("computePerspectiveOffCenter throws without near", function () {
    expect(function () {
      var left = 0,
        right = 0,
        bottom = 0,
        top = 0,
        far = 0;
      Matrix4.computePerspectiveOffCenter(
        left,
        right,
        bottom,
        top,
        undefined,
        far
      );
    }).toThrowDeveloperError();
  });

  it("computePerspectiveOffCenter throws without far", function () {
    expect(function () {
      var left = 0,
        right = 0,
        bottom = 0,
        top = 0,
        near = 0;
      Matrix4.computePerspectiveOffCenter(
        left,
        right,
        bottom,
        top,
        near,
        undefined
      );
    }).toThrowDeveloperError();
  });

  it("computeInfinitePerspectiveOffCenter  throws without left", function () {
    expect(function () {
      var right = 0,
        bottom = 0,
        top = 0,
        near = 0,
        far = 0;
      Matrix4.computeInfinitePerspectiveOffCenter(
        undefined,
        right,
        bottom,
        top,
        near,
        far
      );
    }).toThrowDeveloperError();
  });

  it("computeInfinitePerspectiveOffCenter  throws without right", function () {
    expect(function () {
      var left = 0,
        bottom = 0,
        top = 0,
        near = 0,
        far = 0;
      Matrix4.computeInfinitePerspectiveOffCenter(
        left,
        undefined,
        bottom,
        top,
        near,
        far
      );
    }).toThrowDeveloperError();
  });

  it("computeInfinitePerspectiveOffCenter  throws without bottom", function () {
    expect(function () {
      var left = 0,
        right = 0,
        top = 0,
        near = 0,
        far = 0;
      Matrix4.computeInfinitePerspectiveOffCenter(
        left,
        right,
        undefined,
        top,
        near,
        far
      );
    }).toThrowDeveloperError();
  });

  it("computeInfinitePerspectiveOffCenter  throws without top", function () {
    expect(function () {
      var left = 0,
        right = 0,
        bottom = 0,
        near = 0,
        far = 0;
      Matrix4.computeInfinitePerspectiveOffCenter(
        left,
        right,
        bottom,
        undefined,
        near,
        far
      );
    }).toThrowDeveloperError();
  });

  it("computeInfinitePerspectiveOffCenter  throws without near", function () {
    expect(function () {
      var left = 0,
        right = 0,
        bottom = 0,
        top = 0,
        far = 0;
      Matrix4.computeInfinitePerspectiveOffCenter(
        left,
        right,
        bottom,
        top,
        undefined,
        far
      );
    }).toThrowDeveloperError();
  });

  it("computePerspectiveFieldOfView throws with out of range y field of view", function () {
    expect(function () {
      Matrix4.computePerspectiveFieldOfView(0, 1, 2, 3);
    }).toThrowDeveloperError();
  });

  it("computePerspectiveFieldOfView throws with out of range aspect", function () {
    expect(function () {
      Matrix4.computePerspectiveFieldOfView(1, 0, 2, 3);
    }).toThrowDeveloperError();
  });

  it("computePerspectiveFieldOfView throws with out of range near", function () {
    expect(function () {
      Matrix4.computePerspectiveFieldOfView(1, 1, 0, 3);
    }).toThrowDeveloperError();
  });

  it("computePerspectiveFieldOfView throws with out of range far", function () {
    expect(function () {
      Matrix4.computePerspectiveFieldOfView(1, 1, 2, 0);
    }).toThrowDeveloperError();
  });

  it("clone returns undefined without matrix parameter", function () {
    expect(Matrix4.clone(undefined)).toBeUndefined();
  });

  it("toArray throws without matrix parameter", function () {
    expect(function () {
      Matrix4.toArray(undefined);
    }).toThrowDeveloperError();
  });

  it("getElement throws without row parameter", function () {
    var row;
    var col = 0.0;
    expect(function () {
      Matrix4.getElementIndex(col, row);
    }).toThrowDeveloperError();
  });

  it("getElement throws without column parameter", function () {
    var row = 0.0;
    var col;
    expect(function () {
      Matrix4.getElementIndex(col, row);
    }).toThrowDeveloperError();
  });

  it("getColumn throws without matrix parameter", function () {
    expect(function () {
      Matrix4.getColumn(undefined, 1);
    }).toThrowDeveloperError();
  });

  it("getColumn throws without of range index parameter", function () {
    var matrix = new Matrix4();
    expect(function () {
      Matrix4.getColumn(matrix, 4);
    }).toThrowDeveloperError();
  });

  it("setColumn throws without matrix parameter", function () {
    var cartesian = new Cartesian4();
    expect(function () {
      Matrix4.setColumn(undefined, 2, cartesian);
    }).toThrowDeveloperError();
  });

  it("setColumn throws without cartesian parameter", function () {
    var matrix = new Matrix4();
    expect(function () {
      Matrix4.setColumn(matrix, 1, undefined);
    }).toThrowDeveloperError();
  });

  it("setColumn throws without of range index parameter", function () {
    var matrix = new Matrix4();
    var cartesian = new Cartesian4();
    expect(function () {
      Matrix4.setColumn(matrix, 4, cartesian);
    }).toThrowDeveloperError();
  });

  it("setColumn throws without matrix parameter", function () {
    var cartesian = new Cartesian4();
    expect(function () {
      Matrix4.setColumn(undefined, 2, cartesian);
    }).toThrowDeveloperError();
  });

  it("setTranslation throws without matrix parameter", function () {
    expect(function () {
      Matrix4.setTranslation(undefined, new Cartesian3(), new Matrix4());
    }).toThrowDeveloperError();
  });

  it("setTranslation throws without translation parameter", function () {
    expect(function () {
      Matrix4.setTranslation(new Matrix4(), undefined, new Matrix4());
    }).toThrowDeveloperError();
  });

  it("setTranslation throws without result parameter", function () {
    expect(function () {
      Matrix4.setTranslation(new Matrix4(), new Cartesian3(), undefined);
    }).toThrowDeveloperError();
  });

  it("getRow throws without of range index parameter", function () {
    var matrix = new Matrix4();
    expect(function () {
      Matrix4.getRow(matrix, 4);
    }).toThrowDeveloperError();
  });

  it("setRow throws without matrix parameter", function () {
    var cartesian = new Cartesian4();
    expect(function () {
      Matrix4.setRow(undefined, 2, cartesian);
    }).toThrowDeveloperError();
  });

  it("setRow throws without cartesian parameter", function () {
    var matrix = new Matrix4();
    expect(function () {
      Matrix4.setRow(matrix, 1, undefined);
    }).toThrowDeveloperError();
  });

  it("setRow throws without of range index parameter", function () {
    var matrix = new Matrix4();
    var cartesian = new Cartesian4();
    expect(function () {
      Matrix4.setRow(matrix, 4, cartesian);
    }).toThrowDeveloperError();
  });

  it("multiply throws with no left parameter", function () {
    var right = new Matrix4();
    expect(function () {
      Matrix4.multiply(undefined, right);
    }).toThrowDeveloperError();
  });

  it("multiply throws with no right parameter", function () {
    var left = new Matrix4();
    expect(function () {
      Matrix4.multiply(left, undefined);
    }).toThrowDeveloperError();
  });

  it("multiplyByTranslation throws with no matrix parameter", function () {
    var translation = new Cartesian3();
    expect(function () {
      Matrix4.multiplyByTranslation(undefined, translation);
    }).toThrowDeveloperError();
  });

  it("multiplyByTranslation throws with no translation parameter", function () {
    var m = new Matrix4();
    expect(function () {
      Matrix4.multiplyByTranslation(m, undefined);
    }).toThrowDeveloperError();
  });

  it("multiplyByUniformScale throws with no matrix parameter", function () {
    expect(function () {
      Matrix4.multiplyByUniformScale(undefined, 2.0);
    }).toThrowDeveloperError();
  });

  it("multiplyByUniformScale throws with no scale parameter", function () {
    var m = new Matrix4();
    expect(function () {
      Matrix4.multiplyByUniformScale(m, undefined);
    }).toThrowDeveloperError();
  });

  it("multiplyByScale throws with no matrix parameter", function () {
    expect(function () {
      Matrix4.multiplyByScale(undefined, new Cartesian3());
    }).toThrowDeveloperError();
  });

  it("multiplyByScale throws with no scale parameter", function () {
    var m = new Matrix4();
    expect(function () {
      Matrix4.multiplyByScale(m, undefined);
    }).toThrowDeveloperError();
  });

  it("multiplyByVector throws with no matrix parameter", function () {
    var cartesian = new Cartesian4();
    expect(function () {
      Matrix4.multiplyByVector(undefined, cartesian);
    }).toThrowDeveloperError();
  });

  it("multiplyByVector throws with no cartesian parameter", function () {
    var matrix = new Matrix4();
    expect(function () {
      Matrix4.multiplyByVector(matrix, undefined);
    }).toThrowDeveloperError();
  });

  it("multiplyByPoint throws with no matrix parameter", function () {
    var cartesian = new Cartesian4();
    expect(function () {
      Matrix4.multiplyByPoint(undefined, cartesian);
    }).toThrowDeveloperError();
  });

  it("multiplyByPoint throws with no cartesian parameter", function () {
    var matrix = new Matrix4();
    expect(function () {
      Matrix4.multiplyByPoint(matrix, undefined);
    }).toThrowDeveloperError();
  });

  it("multiplyByScalar throws with no matrix parameter", function () {
    expect(function () {
      Matrix4.multiplyByScalar(undefined, 2);
    }).toThrowDeveloperError();
  });

  it("multiplyByScalar throws with non-numeric scalar parameter", function () {
    var matrix = new Matrix4();
    expect(function () {
      Matrix4.multiplyByScalar(matrix, {});
    }).toThrowDeveloperError();
  });

  it("negate throws without matrix parameter", function () {
    expect(function () {
      Matrix4.negate(undefined);
    }).toThrowDeveloperError();
  });

  it("transpose throws without matrix parameter", function () {
    expect(function () {
      Matrix4.transpose(undefined);
    }).toThrowDeveloperError();
  });

  it("equalsEpsilon throws with non-number parameter", function () {
    expect(function () {
      Matrix4.equalsEpsilon(new Matrix4(), new Matrix4(), {});
    }).toThrowDeveloperError();
  });

  it("getTranslation throws without matrix parameter", function () {
    expect(function () {
      Matrix4.getTranslation(undefined);
    }).toThrowDeveloperError();
  });

  it("getMatrix3 throws without matrix parameter", function () {
    expect(function () {
      Matrix4.getMatrix3(undefined);
    }).toThrowDeveloperError();
  });

  it("inverse throws without matrix parameter", function () {
    expect(function () {
      Matrix4.inverse(undefined);
    }).toThrowDeveloperError();
  });

  it("inverse throws with non-inversable matrix", function () {
    var matrix = new Matrix4(
      1,
      2,
      3,
      4,
      5,
      6,
      7,
      8,
      9,
      10,
      11,
      12,
      13,
      14,
      15,
      16
    );
    expect(function () {
      Matrix4.inverse(matrix, new Matrix4());
    }).toThrowRuntimeError();
  });

  it("inverseTransformation throws without matrix parameter", function () {
    expect(function () {
      Matrix4.inverseTransformation(undefined);
    }).toThrowDeveloperError();
  });

  it("getColumn throws without result parameter", function () {
    expect(function () {
      Matrix4.getColumn(new Matrix4(), 2);
    }).toThrowDeveloperError();
  });

  it("setColumn throws without result parameter", function () {
    expect(function () {
      Matrix4.setColumn(new Matrix4(), 2, new Cartesian4());
    }).toThrowDeveloperError();
  });

  it("getRow throws without result parameter", function () {
    expect(function () {
      Matrix4.getRow(new Matrix4(), 2);
    }).toThrowDeveloperError();
  });

  it("setRow throws without result parameter", function () {
    expect(function () {
      Matrix4.setRow(new Matrix4(), 2, new Cartesian4());
    }).toThrowDeveloperError();
  });

  it("getScale throws without result parameter", function () {
    expect(function () {
      Matrix4.getScale(new Matrix4());
    }).toThrowDeveloperError();
  });

  it("multiply throws without result parameter", function () {
    expect(function () {
      Matrix4.multiply(new Matrix4(), new Matrix3());
    }).toThrowDeveloperError();
  });

  it("multiplyByVector throws without result parameter", function () {
    expect(function () {
      Matrix4.multiplyByVector(new Matrix4(), new Cartesian4());
    }).toThrowDeveloperError();
  });

  it("multiplyByScalar throws without result parameter", function () {
    expect(function () {
      Matrix4.multiplyByScalar(new Matrix4(), 2);
    }).toThrowDeveloperError();
  });

  it("negate throws without result parameter", function () {
    expect(function () {
      Matrix4.negate(new Matrix4());
    }).toThrowDeveloperError();
  });

  it("transpose throws without result parameter", function () {
    expect(function () {
      Matrix4.transpose(new Matrix4());
    }).toThrowDeveloperError();
  });

  it("abs throws without result parameter", function () {
    expect(function () {
      Matrix4.abs(new Matrix4());
    }).toThrowDeveloperError();
  });

  it("inverse throws without result parameter", function () {
    expect(function () {
      Matrix4.inverse(new Matrix4());
    }).toThrowDeveloperError();
  });

  it("multiplyTransformation throws without left parameter", function () {
    expect(function () {
      Matrix4.multiplyTransformation();
    }).toThrowDeveloperError();
  });

  it("multiplyTransformation throws without right parameter", function () {
    expect(function () {
      Matrix4.multiplyTransformation(new Matrix4());
    }).toThrowDeveloperError();
  });

  it("multiplyTransformation throws without result parameter", function () {
    expect(function () {
      Matrix4.multiplyTransformation(new Matrix4(), new Matrix4());
    }).toThrowDeveloperError();
  });

  it("multiplyByMatrix3 throws without left parameter", function () {
    expect(function () {
      Matrix4.multiplyByMatrix3();
    }).toThrowDeveloperError();
  });

  it("multiplyByMatrix3 throws without matrix parameter", function () {
    expect(function () {
      Matrix4.multiplyByMatrix3(new Matrix4());
    }).toThrowDeveloperError();
  });

  it("multiplyByMatrix3 throws without rotation parameter", function () {
    expect(function () {
      Matrix4.multiplyByMatrix3(new Matrix4(), new Matrix3());
    }).toThrowDeveloperError();
  });

  it("multiplyByUniformScale throws without result parameter", function () {
    expect(function () {
      Matrix4.multiplyByUniformScale(new Matrix4(), 2);
    }).toThrowDeveloperError();
  });

  it("multiplyByScale throws without result parameter", function () {
    expect(function () {
      Matrix4.multiplyByScale(new Matrix4(), new Cartesian3());
    }).toThrowDeveloperError();
  });

  it("multiplyByPointAsVector throws without matrix parameter", function () {
    expect(function () {
      Matrix4.multiplyByPointAsVector();
    }).toThrowDeveloperError();
  });

  it("multiplyByPointAsVector throws without cartesian parameter", function () {
    expect(function () {
      Matrix4.multiplyByPointAsVector(new Matrix4());
    }).toThrowDeveloperError();
  });

  it("multiplyByPointAsVector throws without result parameter", function () {
    expect(function () {
      Matrix4.multiplyByPointAsVector(new Matrix4(), new Cartesian3());
    }).toThrowDeveloperError();
  });

  it("multiplyByPoint throws without matrix parameter", function () {
    expect(function () {
      Matrix4.multiplyByPoint(new Matrix4(), new Cartesian3());
    }).toThrowDeveloperError();
  });

  it("getTranslation throws without result parameter", function () {
    expect(function () {
      Matrix4.getTranslation(new Matrix4());
    }).toThrowDeveloperError();
  });

  it("getMatrix3 throws without result parameter", function () {
    expect(function () {
      Matrix4.getMatrix3(new Matrix4());
    }).toThrowDeveloperError();
  });

  it("inverseTransformtation throws without result parameter", function () {
    expect(function () {
      Matrix4.inverseTransformation(new Matrix4());
    }).toThrowDeveloperError();
  });

  it("multiplyByTranslation throws without result parameter", function () {
    expect(function () {
      Matrix4.multiplyByTranslation(new Matrix4(), new Cartesian3());
    }).toThrowDeveloperError();
  });

  it("computePerspectiveFieldOfView throws without result parameter", function () {
    expect(function () {
      Matrix4.computePerspectiveFieldOfView(CesiumMath.PI_OVER_TWO, 1, 1, 10);
    }).toThrowDeveloperError();
  });

  it("computeOrthographicOffCenter throws without result parameter", function () {
    expect(function () {
      var left = 0,
        right = 0,
        bottom = 0,
        top = 0,
        near = 0;
      Matrix4.computeOrthographicOffCenter(left, right, bottom, top, near, 0);
    }).toThrowDeveloperError();
  });

  it("computePerspectiveOffCenter throws without result parameter", function () {
    expect(function () {
      var left = 0,
        right = 0,
        bottom = 0,
        top = 0,
        near = 0;
      Matrix4.computePerspectiveOffCenter(left, right, bottom, top, near, 0);
    }).toThrowDeveloperError();
  });

  it("computeInfinitePerspectiveOffCenter throws without near", function () {
    expect(function () {
      var left = 0,
        right = 0,
        bottom = 0,
        top = 0;
      Matrix4.computeInfinitePerspectiveOffCenter(left, right, bottom, top, 0);
    }).toThrowDeveloperError();
  });

  it("computeViewportTransformation works", function () {
    expect(function () {
      Matrix4.computeViewportTransformation(
        {
          x: 0,
          y: 0,
          width: 4.0,
          height: 6.0,
        },
        0.0,
        2.0
      );
    }).toThrowDeveloperError();
  });

  it("Matrix4 objects can be used as array like objects", function () {
    var matrix = new Matrix4(
      1,
      5,
      9,
      13,
      2,
      6,
      10,
      14,
      3,
      7,
      11,
      15,
      4,
      8,
      12,
      16
    );
    expect(matrix.length).toEqual(16);
    var intArray = new Uint32Array(matrix.length);
    intArray.set(matrix);
    for (var index = 0; index < matrix.length; index++) {
      expect(intArray[index]).toEqual(index + 1);
    }
  });
});
